<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>浏览器缓存</title>
</head>
<body>
    <p>hello world</p>
    <script>
        /* 浏览器端的缓存localStorage，如果不清除则永远存在 */
    localStorage.setItem("city","武汉")
    </script>
</body>
</html>